Changing of the metal properties by the helium implantation

A principal possibility of obtaining high non-equilibrium contents of helium in the state of substitution is predicted on the basis of analysis of theoretical and experimental data of different authors. Decrease of cohesive energy, temperatures and pressures of phase transformations is forecasted. A probability of a helium-vacancy (HeV) complex dissociation is higher than its migration. After HeV decomposition helium finds the outlet over interstitials quicker than vacancy, that is why material migration in non-equilibrium vacancies is possible under heating. It should result in essential increase of diffusion mobility of intrinsic and impurity atoms. Electrons with energy above 10 keV can destroy helium-vacancy complexes